Sulfur oxoanions

Several researchers have reported on the use of porphyrin complexes as 

Studied the electrocatalytic transformation of HS, 8203 , 8405, andS03 to S04 by water-soluble Fe, Mn, and Co porphyrin complexes 

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Figure 27.Cyclic voltammograms of Ni-powder modified CCE in 0.1 M NaOH Solution at scan rate lOOmVs 1. The cycle numbers are written on the voltammograms. Reprinted from Electrochimica Acta, 51 A. Salimi, M. Roushani, R. Hallaj, Micromolar determination of sulfur oxoanions and sulfide ata renewable sol-gel carbon ceramic electrode modified with nickel powder, 1954, Copyrights(2006) with permission from Elsevier.

Table 7.3. Electrochemical Data for the Electrocatalytic Detection of Sulfur Dioxide and Sulfur Oxoanions Using M-N4 complexes ...

Chen, S.-M. (1997). Reversible electrocatalytic reaction of sulfur oxoanions and sulfides by one catalyst of water-soluble cobalt porph5rin. J. Electroanal. Chem. 432(1-2), 101-109. 

Chen, S.-M. (1996). Bicatalyst electrocatalytic reaction of sulfur oxoanions by water-soluble iron porphyrins and iron(II) tris(l,10-penanthroline). Inorg. Chim. Acta 244(2), 155-164. 

Rhenium(VI) complexes, 4,194 alkoxides, 4,196 amides, 4,194 amines, 4,199 carboxylates, 4,199 dimethylformamide, 4,199 dioxane, 4,198 halides, 4,195,199 2-hydroxypyridine, 4,199 imides, 4,194 magnetic behavior, 1,271 mixed sulfur-nitrogen compounds, 4,196 N heterocycles, 4,199 nitrides, 4,194 oxide halides, 4, 195 oxoanions,4,196 pyridine, 4,199 sulfates, 4,198 sulfur compounds, 4,196 tellurates, 4,198... 

The oxoacids and oxoanions of phosphorus are among the most heavily manufactured chemicals. Phosphate fertilizer production consumes two-thirds of all the sulfuric acid produced in the United States. 

Let us add here that despite the general similarities of selenium and sulfur in their chemical properties, the chemistry of selenium differs from that of sulfur in two important aspects their oxoanions are not similarly reduced, and their hydrides have different acid strengths. For example, Se(-HlV) tends to undergo reduction to Se(-II), whereas S(-hIV) tends to undergo oxidation. This difference is evidenced by the ability of selenous acid to oxidize sulftirous acid ... 

Equilibrium constants for formation of iron(III) complexes of several oxoanions, of phosphorus, arsenic, sulfur, and selenium, have been reported. The kinetics and mechanism of complex formation in the iron(III)-phosphate system in the presence of a large excess of iron(III) involve the formation of a tetranuclear complex, proposed to be [Fc4(P04)(0H)2(H20)i6]. The high stability of iron(III)-phosphate complexes has prompted suggestions that iron-containing mixed hydroxide or hydroxy-carbonate formulations be tested for treatment of hyperphosphatemia. " ... 

Analogous oxoanions of elements in the same group of the periodic table are named similarly. Based on the names of the oxoanions of phosphorus and sulfur, name the following anions ... 

KEY CONCEPT PROBLEM 19.10 Consider the following sulfur-containing oxoanions ... 

Although sulfide species are commonly made from sulfur, alkali sulfides, or polysulfides, a useful procedure for converting oxoanions or alkoxides to sulfides is by use of trimethylsilyl sulfide, for example,... 

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